At long last, Stefano Boeri Architects' brilliant Bosco Verticale towers are finally completed. The “world's first vertical forest” consists of a fantastic pair of costly towers that add nearly 2.5 acres of lush vegetation to the sky line of Milan, a city notorious (声名狼藉的) for its air pollution. {#blank#}1{#/blank#} Like a pair of green lungs, its forested appearance of 21,000 plants will absorb CO₂, control noise pollution, lessen the urban heat island effect, and create oxygen and favorable micro-climates.

    The Bosco Verticale mixed-use towers are constructed with a $2.5 billion public-private investment as part of the re-development of Milan's Porta Nuova district. The towers, measuring 260 feet and 367 feet, house 800 trees between 9 and 30 feet tall, over 4,000 shrubs (灌木) and 15,000 ground cover plants. Bosco Verticale is created with LEED Gold Certification (绿色建筑黄金认证) in mind. {#blank#}2{#/blank#} 

    The buildings shrub have welcomed their first residents. {#blank#}3{#/blank#}  A fast-growing bird population has already begun to nest in Bosco Verticale's rich leaves, of which over a hundred different species of trees and shrubs are represented. {#blank#}4{#/blank#} 

    The superstructure is also selected for the world famous International Highrise Building Award as one of the five most beautiful and original high-rises in the world that is completed. {#blank#}5{#/blank#} 

A. “We take great pride in this project, which may earn us an award” says Boeri.

B. Boeri is currently in China, where he plans to build another Bosco Verticale project.

C. It is also equipped with a gray water recycling and irrigation system.

D. However, Bosco Verticale will be more than just a beautiful sight to enjoy.

E. “The real key to this project is biodiversity,” says Boeri.

F. It is also well received by the Chinese experts in the field.

G. But those families aren't the only ones to call the vertical forest home.

    The Kentucky Derby is a horse race held annually in Louisville, Kentucky, United States on the first Saturday in May. Here are some helpful suggestions for your first trip to the Kentucky Derby!

Fashion vs. Comfort

    In many ways, the Kentucky Derby is the world's largest and most entertaining fashion show, with impressive hats and clothes! You'll be on your feet and walking a lot, so pack a pair of comfortable shoes to change into during the day.

Your Tickets

    You MUST have your tickets in order to get through the gates. Please note that the only place that has official permission to buy and resell Kentucky Derby tickets is the Kentucky Derby Ticket Exchange. Law enforcement officials will be on site to prevent people from selling tickets at a much higher price.

    If you have questions about your tickets in advance of the Derby, please call Churchill Downs customer service at 502-636-4400.

Finding Help

    With over 14,000 employees throughout the track on Derby day, you aren't too far from someone who can help. If you can't find an employee to help you, please text the word HORSE to 69050 and you will be placed in touch with Guest Services.

Safety & Security

    For the safety of all our guests, your bag may be searched by security. A number of items are forbidden from entering the facility(场所).

    For security and crowd control reasons, you can't enter the facility again after you get out. This means that you will not be able to go outside the gates to fetch items from your car once you have passed through security. Please be sure to bring everything you need.

    ◆The Big Cake Show comes to the WestPoint Arena in Exeter, England, March 21-22. Hopefully, cakes of all sizes will be on sale and on show. An impressive list of famous people sharing their great knowledge and skill includes Mary Berry, Paul Hollywood and Gregg Wallace. Tickets, from ￡12, are available online (bigcakeshow.com).

    ◆From January 17 to March 8, RHS Garden Wisley in Surrey, England has some special guests to brighten the winter: beautiful butterflies. The Glasshouse introduces a group of butterflies from other countries feeding on fruit and the juice-rich plants of the Exotic Zone. Tickets for adults are ￡13.20, for children are ￡6.60. For a family with 2 adults and 2 children, they should pay ￡32.75 in total. For groups of more than 10 adults, each should pay ￡10.80 (rhs. org.uk/wisley).

    ◆The week-long London Wine Week starts from May 18. Buy a ￡5 wristband to qualify for a pocket-sized guidebook and discounted wine around the capital. Partnering with London' s best bars and restaurants, we will be organizing events such as master classes and meet-the -maker time, plus offering discounts to wristband wearers (londonwineweek.com).

    ◆The World Shakespeare Festival begins in April, with everything from foreign productions of Shakespearean plays at Shakespeare's Globe to Shakespearean plays at the Royal Opera House. Plays will run until the end of the year in London, Birmingham, Newcastle and Gateshead. And there' s a programme of events such as director talks and family workshops. Prices start from ￡60 (worldshakespearefestival.org. uk).

    “Belittle” was first used by Thomas Jefferson, the third president of the United States.

    Many years ago, Buffon, a French naturalist, wrote some books about natural history. The books were a great success even though some critics did not like them. Some critics said, “Buffon is more of a poet than a scientist.”

    Thomas Jefferson did not like what Buffon had said about the natural wonders of the New World. It seemed to Jefferson that Buffon had spoken of natural wonders in America as if they were unimportant.

    This troubled Thomas Jefferson. He was a naturalist, as well as a farmer, inventor, historian, writer and politician. He had seen the natural wonders of Europe. To him, they were no more important than those of the New World.

    In 1788, Thomas Jefferson wrote about his home state, Virginia. While writing, he thought of its natural beauty and then of the words of Buffon. At that moment, Jefferson created a new word－belittle. He said, “Buffon believes that nature belittles her productions on this side of the Atlantic.”

    Noah Webster, the American word expert, liked this word. He put it in his English language dictionary in 1806, “Belittle－to make somebody or something small, unimportant.”

    Americans had already accepted Jefferson's word and started to use it. In 1797, the Independent Chronicle newspaper used the word to describe a politician the paper supported. “He is an honorable man,” the paper wrote, “so let the opposition try to belittle him as much as they please.

    In 1872, a famous American word expert decided that the time had come to kill this word. He said, “'Belittle' has no chance of becoming English. And as more critical writers of America, like those of Britain, feel no need of it, the sooner it is forgotten, the better.” This expert failed to kill the word. Today, “belittle” is used where the English language is spoken.

    Dreams are expressions of thoughts, feelings and events that pass through our minds while we are sleeping. People dream about one to two hours each night. We may have four to seven dreams in one night. Everybody dreams. But only some people can remember their dreams.

    The word “dream” comes from an old word in English that means “joy” and “music”. We dream in color. Our dreams often include all the senses—smells, sounds, sights, tastes and things we touch. Sometimes we dream the same dream over and over again. These repeated dreams are often unpleasant. They are bad dreams that sometimes frighten us.

    Artists, writers and scientists sometimes say they get ideas from dreams. For example, the singer Paul McCartney of the Beatles said he awakened one day with the music for the song Yesterday in his head. The writer Mary Shelley said she had a very strong dream about a scientist using a machine to make an animal come alive. When she woke up, she began to write her book about a scientist named Frankenstein who made a frightening monster(妖怪).

    In China, people believed that dreams were a way to visit with family members who had died. Some native American tribes(部落) and Mexican civilizations believe dreams are a different world we visit when we sleep.

    Most dog owners have probably been puzzled waiting for their dog to do its business. Instead of just finding a soft area of grass to go number two, they make a whole ritual(仪式) out of it, spinning in a circle before finally squatting(蹲下). Luckily, the ultimate pet owners' question may finally have been answered.

    A few theories have circulated about why dogs might circle before pooping  and most are similar to the reasons they spin before lying down. Trampling around in a circle would flatten the grass around, which would keep tall blades(叶片) from trapping their waste. Another explanation could be that they're scanning for snakes and predators before they become completely occupied.

    But Czech researcher Hynek Burda didn't quite buy into those theories. Dogs evolved from wolves, which didn't need to worry much about tall grass. And if they were scanning their environment, keeping still to listen and sniff would be more effective than giving the area a quick once-over. Instead, Burda suggested that dogs spin to get a feel for the Earth's magnetic pull.

    The Earth has a magnetic field around it protecting it from radiation from space, and some animals seem to use it to get a sense of where its North and South poles are. For instance, it's how birds know which way to migrate. In 2013, Burda published a study in the journal Frontiers in Zoology suggesting dogs have a strong internal compass, too. He and his team spent two years watching 70 dogs poop and pee and recording which way they faced and how strong the magnetic(磁的) field was.

    As it turns out, when the magnetic field was calm, dogs preferred to poop facing either north or south.

    The pattern couldn't explain why dogs like facing the Earth's poles, but the researchers think it might help them remember where they marked their territory.

    If they can remember which way they were facing, they might find it easier to find that spot again. So before you roll your eyes when your dog takes ages to do his business, remember that Fido might just be getting scientific about his potty spot.